阅读下面材料，根据要求完成66﹣70题．

Smart phones with cameras that can take selfies （自拍）have become popular．We can now take every moment of our life and （hen share it with the world through the Internet．However，some believe that taking a selfie is causing people to take risks that sometimes cause death!

Though the problem of taking selfies has been known for a while，it became worse and had to be dealt with on September 21st，following the death of Frank，who was trying to take a selfie with his friend when they fell off some stairs．His friend only broke his leg while

Frank died from the accident．It was reported that three Indian students were run over（碾压） by a passing train while they were taking a selfie on the railway tracks．

More and more selfie﹣connected accidents are forcing（迫使）some governments to deal with the problem．In July，the Russian Interior Ministry began a program which didn't allow using the selfie stick（自拍杆）．Many museums and theme parks haven't allowed visitors to use the selfie stick，either．

Although official（官方的）ways may help reduce（减少）the accidents，the only way to stop selfie﹣connected accidents is that everyone takes them seriously．So when you decide to take a selfie that appears dangerous，be sure to stop．

根据短文内容，回答问题（66﹣69），英译汉（70）．

66．Who was lucky enough not to die after he fell off some stairs？

　　

67．What happened to the three Indian students while they were taking a selfie？

　　

68．What is the topic sentence（中心句） in the third paragraph？

　　

69．When did the Russian Interior Ministry stop people from using the selfie stick？

　　

70．Put the underlined sentence "when you decide to take a selfie that appears dangerous，be sure to stop．"into Chinese．